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X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a40e8d9.ac7367b4.6675.000e.GAE@google.com> Subject: [moderation/CI] Re: minix: convert to iomap and add direct I/O From: syzbot ci To: syzkaller-upstream-moderation@googlegroups.com Cc: syzbot@lists.linux.dev Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v2] minix: convert to iomap and add direct I/O https://lore.kernel.org/all/cover.1782619718.git.jbingham@gmail.com * [PATCH v2 1/4] minix: add iomap infrastructure * [PATCH v2 2/4] minix: convert address space operations to iomap * [PATCH v2 3/4] minix: convert file operations to iomap and add * [PATCH v2 4/4] minix: fix symlink and truncate for iomap and found the following issues: * BUG: sleeping function called from invalid context in bdev_getblk * BUG: sleeping function called from invalid context in find_get_block_common Full report is available here: https://ci.syzbot.org/series/3b663c96-cf07-46e0-9b8d-785fe615029d *** BUG: sleeping function called from invalid context in bdev_getblk tree: torvalds URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux base: 780d569e6c4b422290f5cba319eb904b355d64be arch: amd64 compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6 config: https://ci.syzbot.org/builds/61f38821-60a2-4c7c-a39e-27291869d296/config syz repro: https://ci.syzbot.org/findings/dda4e5c2-7cbc-498a-98ea-83cad3c680e3/syz_repro option from the mount to silence this warning. ======================================================= BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:323 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5865, name: syz.1.18 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 1 lock held by syz.1.18/5865: #0: ffffffff8e959c20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8e959c20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffffffff8e959c20 (rcu_read_lock){....}-{1:3}, at: path_init+0x124/0x1330 fs/namei.c:2689 CPU: 1 UID: 0 PID: 5865 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 __might_resched+0x378/0x4d0 kernel/sched/core.c:9197 might_alloc include/linux/sched/mm.h:323 [inline] bdev_getblk+0xce/0x6e0 fs/buffer.c:1435 __bread_gfp+0x89/0x380 fs/buffer.c:1493 sb_bread include/linux/buffer_head.h:348 [inline] minix_get_link+0x143/0x340 fs/minix/namei.c:396 pick_link+0x782/0xfe0 fs/namei.c:2064 step_into_slowpath+0x58a/0x820 fs/namei.c:2127 step_into fs/namei.c:2152 [inline] open_last_lookups fs/namei.c:4643 [inline] path_openat+0x224e/0x3830 fs/namei.c:4856 do_file_open+0x23e/0x4a0 fs/namei.c:4888 do_sys_openat2+0x115/0x200 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9618b9ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9619a29028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f9618e15fa0 RCX: 00007f9618b9ce59 RDX: 0000000000105042 RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007f9618c32e6f R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9618e16038 R14: 00007f9618e15fa0 R15: 00007fffce8916b8 *** BUG: sleeping function called from invalid context in find_get_block_common tree: torvalds URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux base: 780d569e6c4b422290f5cba319eb904b355d64be arch: amd64 compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6 config: https://ci.syzbot.org/builds/61f38821-60a2-4c7c-a39e-27291869d296/config syz repro: https://ci.syzbot.org/findings/2af8da3b-836a-479e-9af0-fef473c2f315/syz_repro loop2: detected capacity change from 0 to 64 bad symlink on inode 4 BUG: sleeping function called from invalid context at ./include/linux/pagemap.h:1155 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5813, name: syz.2.19 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 1 lock held by syz.2.19/5813: #0: ffffffff8e959c20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8e959c20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffffffff8e959c20 (rcu_read_lock){....}-{1:3}, at: path_init+0x124/0x1330 fs/namei.c:2689 CPU: 1 UID: 0 PID: 5813 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 __might_resched+0x378/0x4d0 kernel/sched/core.c:9197 folio_lock include/linux/pagemap.h:1155 [inline] __find_get_block_slow fs/buffer.c:242 [inline] find_get_block_common+0x2d0/0xe10 fs/buffer.c:1386 bdev_getblk+0x58/0x6e0 include/linux/gfp.h:-1 __bread_gfp+0x89/0x380 fs/buffer.c:1493 sb_bread include/linux/buffer_head.h:348 [inline] minix_get_link+0x143/0x340 fs/minix/namei.c:396 pick_link+0x782/0xfe0 fs/namei.c:2064 step_into_slowpath+0x58a/0x820 fs/namei.c:2127 step_into fs/namei.c:2152 [inline] open_last_lookups fs/namei.c:4643 [inline] path_openat+0x224e/0x3830 fs/namei.c:4856 do_file_open+0x23e/0x4a0 fs/namei.c:4888 do_sys_openat2+0x115/0x200 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd37ef9ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd37fe06028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fd37f215fa0 RCX: 00007fd37ef9ce59 RDX: 0000000000000042 RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007fd37f032e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd37f216038 R14: 00007fd37f215fa0 R15: 00007ffe5e5f14f8 bad symlink on inode 4 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a patch for this bug, please reply with `#syz test` (should be on a separate line). The patch should be attached to the email. Note: arguments like custom git repos and branches are not supported. The email will later be sent to: [brauner@kernel.org hch@infradead.org jack@suse.cz jbingham@gmail.com jkoolstra@xs4all.nl linux-fsdevel@vger.kernel.org linux-kernel@vger.kernel.org syzkaller@googlegroups.com viro@zeniv.linux.org.uk] If the report looks fine to you, reply with: #syz upstream If the report is a false positive, reply with #syz invalid